[simonrozsival]

---

Pull Request
title and
description
should follow the
commit-messages.md workflow documentation, and in particular should include:

• Useful description of why the change is necessary.
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• Unit tests

Continue the final dependency/packaging audit for #11843. Two Java.Interop projects are outside the Android, retained tooling-test, and bootstrap dependency closure; neither assembly is included in SDK, reference, or runtime packs.

Remove the unused Xamarin.Android.Tools.AnnotationSupport.Cecil adapter. Binding generation already uses ManagedTypeFinderGeneratorTypeSystem; retain the live annotation library and generator adapter.

Remove the duplicate standalone Java.Interop.Tools.TypeNameMappings.csproj and its unused shared-project wrappers. Keep JavaNativeTypeManager.cs unchanged, including its direct compilation into Mono.Android and the shipped Java.Interop.Tools.JavaCallableWrappers assembly. No public product API or naming implementation is removed.

Remove three version-only PackageReference Update entries without subtree Include consumers: Microsoft.CSharp, Microsoft.DotNet.GenAPI, and Mono.Linq.Expressions. Actual package dependencies and versions are unchanged; outer Android bootstrap/device-test references remain untouched.

All 27 retained Java.Interop projects remain reachable from Android, the nine host suites, or live bootstrap. The Android-side closure remains 17 projects, and the project-declared package ID set remains 14. SDK/ref/runtime manifests, shared source links, JNINativeWrapper compatibility APIs, and supported runtime/generator paths are unchanged. The audit and detailed evidence are attached to #11843. This is independent of the runner/bootstrap and documentation cleanup PRs.

Validation

Fresh local worktree validation used existing javac 23.0.2, DOTNET_PROCESSOR_COUNT=2, and JAVA_TOOL_OPTIONS='-XX:ActiveProcessorCount=2'. $jdk is the local JDK home and $artifacts is the session artifact directory; logs/binlogs/TRX were retained locally.

dotnet build external/Java.Interop/Java.Interop.slnx -t:Prepare -c Debug -m:1 --disable-build-servers -nr:false -p:UseSharedCompilation=false "-p:JdksRoot=$jdk" '-p:GradleArgs=--stacktrace --no-daemon --max-workers=1 -Pkotlin.compiler.execution.strategy=in-process' "-bl:$artifacts/dependency-audit-prepare.binlog" -v:minimal

Passed.

dotnet build external/Java.Interop/Java.Interop.slnx -c Debug -m:1 --disable-build-servers -nr:false -p:UseSharedCompilation=false '-p:GradleArgs=--stacktrace --no-daemon --max-workers=1 -Pkotlin.compiler.execution.strategy=in-process' "-bl:$artifacts/dependency-audit-build.binlog" -v:minimal

Passed, 0 warnings and 0 errors.

dotnet test external/Java.Interop/Java.Interop.slnx -c Debug --no-build --no-restore -m:1 --disable-build-servers -nr:false -p:UseSharedCompilation=false --logger trx --results-directory "$artifacts/dependency-audit-results" "-bl:$artifacts/dependency-audit-tests.binlog" -v:minimal

All nine suites ran: 799 passed, 1 failed, 2 skipped. The only failure is the pre-existing ModuleInfoTests.ClassFile expectation of 12 constant-pool entries versus 13 emitted by javac 23.0.2. Independently archived main's Java fixtures and compiled them using the same evaluated source lists/compiler flags: baseline/current module-info.class are byte-identical (SHA-256 70344aeaf5936f8f8256ab7416958bf867f45f8309d4aa9a44f35b8f6393ab99). Test and bytecode-library sources are unchanged. No suppression, exclusion, JDK pin, or unrelated test change was made.

dotnet build external/Java.Interop/tools/java-source-utils/java-source-utils.csproj -t:RunTests -c Debug --no-restore -m:1 --disable-build-servers -nr:false -p:UseSharedCompilation=false '-p:GradleArgs=--stacktrace --no-daemon --max-workers=1 -Pkotlin.compiler.execution.strategy=in-process' "-bl:$artifacts/dependency-audit-java-source-tests.binlog" -v:minimal

All 18 Java tests passed; six existing obsolete-Java-8-option warnings, zero errors.

dotnet sln external/Java.Interop/Java.Interop.slnx list, read-only MSBuild evaluation of all 27 projects, static baseline/current project/package/pack/source-link checks, and git diff --check passed. No full Android SDK/native build or device tests were run for these unshipped-project/version-metadata-only deletions.

Fixes: #11843

[Copilot]

🔵 Needs a closer look

No actionable code issues were identified, but completed Android integration validation remains unconfirmed.

No open issues 🎉

What changed in this PR

Continues #11843’s dependency cleanup by removing unused Java.Interop tooling projects while preserving shared naming code and shipped components.

Changes:

• Removes the unused Cecil annotation adapter.
• Removes the standalone TypeNameMappings project and shared-project wrappers.
• Drops three unused package-version pins and updates solution membership.

File	Description
external/​Java.Interop/​src/​Xamarin.Android.Tools.AnnotationSupport.Cecil/​Xamarin.Android.Tools.AnnotationSupport.Cecil.csproj	Removes unused adapter project.
external/​Java.Interop/​src/​Xamarin.Android.Tools.AnnotationSupport.Cecil/​ManagedTypeFinderCecil.cs	Removes adapter implementation.
external/​Java.Interop/​src/​Xamarin.Android.Tools.AnnotationSupport.Cecil/​CecilExtensions.cs	Removes adapter-specific helpers.
external/​Java.Interop/​src/​Java.Interop.Tools.TypeNameMappings/​Java.Interop.Tools.TypeNameMappings.shproj	Removes unused shared-project wrapper.
external/​Java.Interop/​src/​Java.Interop.Tools.TypeNameMappings/​Java.Interop.Tools.TypeNameMappings.projitems	Removes unused shared-source metadata.
external/​Java.Interop/​src/​Java.Interop.Tools.TypeNameMappings/​Java.Interop.Tools.TypeNameMappings.csproj	Removes duplicate standalone project.
external/​Java.Interop/​Java.Interop.slnx	Removes deleted projects from the solution.
external/​Java.Interop/​Directory.Build.targets	Removes three unused package-version pins.

_{Review effort: Balanced}